Edwin w



(No Model.)

B. W. LUOE.

THROTTLE VALVE.

Patented May 15, 1888.

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EDWIN W. LUOE, OF BOLIVAR, NEW YORK.

TH ROTTLE-VALVE.

SPECIFICATION forming part of Letters Patent. No. 382,993, dated May15', 1888.

Application filed December 16, 1887. Serial No. 258,069. (No model.)

To aZZ whom it may concern:

Be it known that I, EDWIN W. LUcn, a citizen of the United States ofAmerica, residing at Bolivar, in the county of Allegany and State of NewYork, have invented certain new and useful Improvements inThrottle-Valves, of which the following is a specification, referencebeing bad therein to the accompanying drawings.

This invention relates to an improvement in that class of devicestechnically known as throttle-valves, and it consists of certainpeculiaritiesin the construction, arrangement, and combination of parts,substantially as hereinafter described, and particularly pointed out inthe subjoined claim.

In the accompanying drawings, illustrating my invention, and in whichlike letters of reference designate the same parts, Figure 1 is asectional side elevation of my improved throttle-valve. Fig. 2 is asimilar view of a por tion of the same, showing the valve elevated fromits scat. Fig. 3 is a transverse section on 00 w of Fig. 1, showing mostclearly the ribs formed on theinteriorof the valve-body, which serve asa guide for the valve and prevent the possibility of the stem of thesame becoming broken by the pressure of the fluid. Fig. dis a detailrepresentation in perspective of a plug, the upper extremity of whichforms the seat for the valve. Fig. 5 is a detail sectionalrepresentation of the stuffing-box, showing the grooves formed on itsinterior and the flaring or bellshaped bottom.

The primary object of my invention is to increase the efficiency ofoperation and durability of throttlevalves, and at the same time tolessen their cost of manufacture.

Another object of my invention is to construct a valve of the characterset forth, in which, in the event of the primary seat for the valvebeing worn away by friction'or otherwise, the valve will be providedwith a secondary seat, thus providing a means for constant use, whetherthe valve is under pressure or not, and permitting the removal of theplug in order to substitute another seat in the event of the pressureentering the upper port first.

The object, further, of my invention is to provide a means for drainageof valves, which can be readily and easily operated without thenecessity for removing the plug closing the lower portion of the racewayof the valvebody.

Still another object of my invention is to construct a means by whichthe valve will always be caused to center the same, and which willprevent the possibility of the valve stem becoming bent by any pressure.

The object, further,of my invention is to c011- struct a throttlevalvewhich will permit ready and easy access to any of its parts for thepurpose of the removal of the gaskets or packing and the other portionsof the device, in order to substitute others, or for any other purpose,and to construct one which, by reason of its many advantages, willreadily recommend itself to those persons using such inventions.

Referring to the drawings, A represents the valve-body, which may bemade of any suitable size, shape, or material, and which is pro videdwith suitable inlet and outlet pipes, B and C, respectively, extendingat right angles to a raceway, D, which raceway extends the entire lengthof the valve-body and comprises an upper chamber, D, and a lowerchamber, D WVithin the upper chamber, D, of this raceway D is situatedthe valve E, which is by preference formed with a recess, 6, on itslower face, and an annular flange, c, on its upper edge, and has itsseat upon a gasket, K, situated upon the upper portion of a plug, J, tobe hereinafter described, and provided with a stem, F, having ahand-wheel, F, or other suitable operating device. This stem F passesthrough a stuffingbox, G, to which it is connected by means ofscrew-threads, the lowermost extremity of the stufling-box also beingformed with a series of screw-threads,

g, engaging with a corresponding series of screw-threads, a, formed onthe interior of the valvebody A in such a manner that these parts willbe secured together; and in order to prevent the possibility of verticalaccidental displacement of this stuffing-box, it is formed with anannular flange, G, adapted to rest upon the uppermost extremity of thevalvebody, as clearly shown in Fig. l. The uppermost extremity ofthisstuffingbox G is formed with a recess, H, of suitable size, the bottomof which is formed flaring or bell-shaped, as shown ath, Figs. 1 and 5,and the sides of which are formed with a series of grooves or mortises,H, as shown in Fig. 5. This recess H is adapted to receive andaccommodate a gasket or packing, I, which gasket is preferably formed ofsoft metal, and is forced into position upon the bottom of the recess bymeans of a screw-cap, I, which is adapted to encircle the valve-stem F,and is formed with an annular groove, 45, for the reception of the upperend of the stuffing-box G. It will be observed that the ridges formed onthe interior of the recess H by the grooves or mortises H will tend toalways keep the screwcap I in position by preventing its becomingloosened and displaced by turning, which was a disadvantage commonlyexperienced in other devices of a like character. It will be observed,further, that by forming the bottom of the recess flaring orbell-shaped, as shown, and situating the gasket or packing I therein,the gasket or packing may be replenished while the device is underpressure simply by removing the screw-cap, the packing obviouslyremaining in the bell portion of the recess until removed by the hand.These are both features of prime importance in my invention, and theiradvantages will be readily recognized and appreciated by those personsfamiliar with this class of invention.

The interior of the raceway D is formed with a series of ribs orflanges, D D, (shown best in Fig. 3,)which extend the entire length ofthe same, those in the upper chamber, D, being adapted to serve thedouble purpose-of a guide for the valve, causing it to center the sameat all times, and as a protector for the valve-stem,preventing its beingbroken by the pressure of the fluid or steam within the valvebody, whilethose in the lower chamber, D, serve as guides for the upper portion ofthe plug J.

The plug J is formed in two parts, the upper of which, J, is shown indetail in Fig. 4. It will be seen that this portion of the plug is madesomewhat in the form of a skeleton frame, having a series of holes, Jcommunicating with the inlet and outlet pipes B and O of the valve-body,and which holes are made of such a size as to leave comparatively smallsupports J between them; butit will be quite obvious that these supportsJ* will be of sufficient strength and size to perform the functions forwhich they are designed, while at the same time they will not formobstructions to the free passage of the steam or water. The upperextremity of this portion J is formed with an annular groove or recessadapted to seat a gasket, K, preferably formed of soft metal, and which,as before stated, serves as the seat for thevalveE. Theinterior ofthevalve-body Ais formed at this point with a flange, M, the outermostextremity of which rests against the said gasket K, which flange Mserves as what might be termed a secondary seat for the valve, it beingadapted to come into use when the primary seat K is worn or being worndown, as obviously the larger diameter, 6, of the cup-shaped valve Ewill then come into contact with this seat M. This is a feature of primeimportance, inasmuch as it provides a means permitting the constant useof the valve, whether under pressure or not, and it facilitates theready and easy .removal of the plug in order to substitute another seat.The lower portion, J, of this plug J is adapted to be screwed to theinterior of the raceway D, and closes its lower end, and it is formedwith an annular recess to receive agasket, N, upon which the upperportion, J, rests, which obviously forms a tight joint, effectuallypreventing the escape of any of the water or steam around thescrew-threads of the plug by leaking, which would otherwise occur.

The portion J of the plug J is formed with a screw-threaded perforation,0, extending entirely through it, which is normally kept closed by meansof a headed screw-threaded bolt, P, which is formed with a longitudinalrecess, Q, made of a suitable width and eX- tending from the upper edgeto a point near the head of the same. It will be quite obvious that thisarrangement will obviate the necessity of removing the plug in order todrain the valve-body, as it can be done simply by unscrewing the bolt,and the recess Q, in the bolt will obviate the necessity of entirelyremoving the bolt in order to accomplish the above result when it is notdesired that the water shall flow out with great rapidity; but therapidity with which the Water shall flow from the chamber through thisdrainage-opening can be regulated by the amount of opening left-that is,to say, if it is desired to cause but a small amount of water within thevalve-body to flow out,the bolt is only partially unscrewed toleave buta small opening,and for a larger quantity it is unscrewed more,inproportion to the quantity of water desired to be removed, while if itshould be desired to entirely drain the valve-body the passage isentirely uncovered by removing the bolt.

From the foregoing the operation of my device will be readilycomprehended. The steam or water enters the inlet-pipe B and flows downinto the chamber D, within which it is held when the valve is in itsclosed position. (Shown in Fig. l.) lVhen the valve is removed from itsseat, as shown in Fig. 2, the water or steam will take the course shownby the arrows in Figs. 1 and 2, and will flow out of the chamber Dthrough the outlet-pipe C.

It will doubtless be found in the practical construction of my inventionthat many ofthe details might be advantageously varied, and I thereforedo not wish to be understood as limiting myself to the preciseconstruction and arrangement of parts herein shown and described, butreserve the liberty of varying these details without departing from thegeneral spirit of the invention.

Having thus described the objects, advantages, and construction of myinvention, what I believe to be new, and desire to secure by LettersPatent,and what I therefore claim,is-

In a valve, the combination, with the main body havinginlet and outletpipes, of a twopart plug fitting therein, the upper of which parts isformed with lateral holes opening communication between the said pipesand the interior of the plug, and also with a recess at its top to forma seat for the valve, and the lower of which parts closes the lowermostextremity of the Valve-body, is formed at its top with an annularrecess, forming a water and steam tight joint between it and the upperportion, and is also formed with a screwthreaded perforation and ascrew-threaded drainage-plug normally closing the said perforation, andhaving a recess in its side extending but partially to itshead,substantially 15 as and for the purposes herein set forth.

In testimony whereof I affix my signature in presence of two witnesses.

EDWIN WV. LUCE. \Vitnesses:

NEWELL PHILLIPS, CHAS. H. BROWN.

